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Just before the end of 2022, the NFIP received its’ 25th short term reauthorization (hip hip hooray!) and our next reauthorization deadline is September 30th, 2023. The NFIP continues its’ transformation in many areas, including transition from a class/zone-based system to individual structure risk assessment and premium determination. We will overview the status of Risk […]
Flooding in coastal areas can occur as a result of several factors, including low-lying areas, land subsidence causing adverse slopes in storm sewer pipes, high groundwater, inadequate hydraulic carrying capacity, and the age of the stormwater system, which may have been laid in the ground before current design standards were implemented. In recent years, another […]
The National Watershed Research Network (NWRN) is a collaborative that helps communities achieve clean water and healthy watersheds by funding applied research on topics determined by its members. Together, we aim to provide insights into the impacts of land use activities on water resources, and identify regulations, programs, and practices that can best prevent or […]
Nature-based solutions utilize nature, open space, and ecosystems that can provide multiple benefits to communities, including protection from natural hazards. The FEMA Hazard Mitigation Assistance (HMA) programs present a crucial opportunity to reduce the risk to communities from natural hazards, while simultaneously reducing communities’ overall reliance on Federal disaster funds. The HMA program includes three […]
Surface-coal mining in central Appalachia often results in salinization of headwater streams and alterations of habitat for aquatic biota. Responses in macroinvertebrate community composition across streams that vary in specific conductance (SC) and habitat have been documented. Headwater streams can also exhibit within-stream spatial variation in SC and habitat, frequently via dilution of mining-effluent, alterations […]
Zooplankton are integral components of freshwater lake and reservoir food webs. Because of their role as a food source for fish and their ability to rapidly graze down algal populations, zooplankton play a critical role in maintaining water quality. To avoid fish predation during the day, zooplankton may migrate both vertically or horizontally (Diel Vertical […]
The design storm is a fundamental parameter for risk and vulnerability assessment of urban infrastructure. It is traditionally determined from historic observations. There is however growing recognition that design storm calculations based on historical data may misrepresent flood risk due to future climate change. To determine if and when the design storm calculation should consider […]
In response to worsening flooding conditions exacerbated by climate change and to address flooding in low-income and environmentally vulnerable areas, the Town of Ashland contacted JMT to develop a flood resiliency plan for the Town. JMT initially assisted the Town in preparing the application for grant funds via the Virginia Community Flood Preparedness Fund. The […]
Ramboll has undertaken several resiliency projects across Europe and around the world, and several climate adaptation projects are now underway in the Americas, as well. Once limited to hardscape infrastructure, resiliency projects are moving rapidly toward green infrastructure, as it is often more cost effective and takes into account whole community solutions instead of focusing […]
Due to climate change, the shape of future extreme precipitation likeliness is uncertain. Global climate models are not intended to capture local extremes, and different climate models provide different results. This is problematic for public works departments, transportation agencies, and other groups responsible for water resources infrastructure, because extreme event estimates drive engineering design. However, […]
The Virginia Lakes and Watershed Association is a volunteer organization and its mission is to provide education on water resources in Virginia.
